Home / 20,121.82-30,175.88-6,971.12

Finding the Fourth Proportional to 20,121.82, 30,175.88 and 6,971.12

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Solution

The fourth proportional to 20,121.82, 30,175.88 and 6,971.12 is: 10,454.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.82 : 30,175.88 = 6,971.12 : x
  2. Step 2: Convert to fraction form
    20,121.82/30,175.88 = 6,971.12/x
  3. Step 3: Cross multiply
    20,121.82x = 30,175.88 × 6,971.12
  4. Step 4: Simplify right side
    20,121.82x = 210,359,547.13
  5. Step 5: Solve for x
    x = 210,359,547.13/20,121.82
  6. Step 6: Final answer
    x = 10,454.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.